RT8082

2

DS8082-00

November 2012

www.richtek.com

©

Copyright

2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Functional Pin Description

Pin No.

Pin Name

Pin Function

1, 12

LX

Internal Power MOSFET Switches Output. Connect these pins to the inductor

together.

2, 11

VIN

Power Input. Decouple this pin to GND with two 10

μF capacitors.

3, 10,

13 (Exposed Pad)

PGND

Power Ground. The exposed pad must be soldered to a large PCB and connected

to ground for maximum power dissipation.

4

AGND

Analog Ground. Provides the return path for control circuit and internal reference.

5

BIAS

Analog Power Input. Decouple this pin to AGND with a minimum 0.1

μF ceramic

capacitor.

6

FB

Feedback Input. This pin is used to set the desired output voltage via an external

resistive divider. The feedback reference voltage is 1V typically.

7

NC

No Internal Connection.

8

EN

Enable Control Input. Floating this pin or connecting this pin to logic high will

enable the device and pulling this pin to logic low will disable the device.

9

PGOOD

Power Good Indicator. This pin is an open drain logic output that is pulled to

ground when the output voltage is within

±7% of regulation point.

Pin Configurations

(TOP VIEW)

WDFN-12E 3x3

LX

VIN

BIAS

AGND

LX

VIN

PGND

EN

PGOOD

PGND

FB

NC

11

10

9

1

2

3

4

5

12

67

8

13